package demo2;

public class KeyBoard implements USB {
    public void openDevice() {
        System.out.println("键盘开始工作！");
    }

    public void input() {
        System.out.println("疯狂敲击键盘！");
    }



    public void closeDevice() {
        System.out.println("键盘结束工作！");
    }

}
